"Famously – to its comparatively few devotees and visitors, that is – it is the biggest henge in Britain that isn't there, surrounding one of the biggest artificial hills in Britain, which isn't there either"
"and the wholly unexpected discovery – the second, smaller henge so close to the modern houses that the roots of two trees at the foot of a back garden are actually growing into its bank."
There we are two-a penny henges, all over the place, swept clean and tidied up before they move on.
http://www.themodernantiquarian.com/post/89170/news/marden_henge_and_hatfield_barrow.html
There is rather a lot to think about when you get past all the have you never heard of stuff. Hence I attempted to highlight the bank archaeology on another thread. From being one of the least talked about aspects, other than the cliche of it not being defensive, to have to think of banks as more than spoil from the ditch is an enforced leap for public thinking. And I am not just saying that because I loathe seeing those wooden staircases at Avebury (though I do, albeit something had to be done). There was a serious proposal to mount a wooden staircase on Silbury - can you imagine that?